主要通风机运转前应检查起动设备动作是否灵敏可靠,()是否正确。

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问题:

主要通风机运转前应检查起动设备动作是否灵敏可靠,()是否正确。

考点:煤矿矿井主扇风机操作工煤矿矿井主扇风机操作工题库
题型:填空题

关于动量守恒,下列说法中正确的有[ ]

A.系统不受外力,或者所受外力的合力为零,系统的总动量守恒

B.一枚在空中飞行的导弹,在某点速度沿水平方向,突然炸裂成两块,则爆炸前后导弹动量近似守恒

C.子弹水平飞行,击穿一块原来静止在光滑水平面上的木块,因为子弹穿透木块的过程中受到阻力作用,所以子弹和木块组成的系统总动量不守恒    

D.汽车拉着拖车在水平公路上匀速前进,若拖车突然和汽车脱钩,而汽车的牵引力不变,两车所受阻力与车重成正比,则在拖车停止运动之前,汽车和拖车组成的系统总动量不守恒

题型:填空题

阅读下面短文,根据以下提示:1)汉语提示,2)首字母提示,3)语境提示,在每个空格内填入一个

适当的英语单词,并将该词完整地写在右边相对应的横线上。所填单词要求意义准确,拼写正确。

Dear editor,

     I am Evan from Canada. Being the eldest child in the family has its disadvantages. First of all, I have to

share all my (1)______ (玩具) with my younger sisters. Of course, they don't (2)n_____ to return the favor

because I'm totally uninterested in their things. (3)______ (除……之外) that, they are always hanging around

me. I just can't get a moment's (4)p______.

     At meals, I have to eat whatever is (5)______ the plate regardless of the taste. My sisters only try one bite

if it's not (6)______ favorite food. In addition, (7)w______ it comes to practicing our musical instruments, I

have to practice (8)______ than double the time. Worst of all, I get a larger quantity of homework, (9)______

(对比) to them.

     I'm feeling rather annoyed. Can you please (10)g______ me some advice?

                                                                                                                                         Yours truly

                                                                                                                                          Evan Smith

题型:填空题

每张操作票可填写几个操作任务?

题型:填空题

开工时吸收稳定系统充瓦斯的目的是()。

A、引油建立三塔循环

B、赶水

C、试压

D、贯通流程

题型:填空题

男,54岁,2型糖尿病15年,长期口服格列本脲,10mg/d。查体:血压140/90mmHg,心、肺和腹部检查未见异常,双下肢无水肿。眼底检查:视网膜病变Ⅲ期。空腹血糖6.8mmol/L,餐后2h血糖10.6mmol/L,血尿素氮6.2mmol/L,血肌酐92.5mmol/L。尿常规检查尿糖5.0mmol/L,蛋白阴性。

经检查为糖尿病早期肾病,治疗应首选()

A.利尿剂

B.血管紧张素转换酶抑制剂

C.α受体阻滞剂

D.β受体阻滞剂

E.钙通道阻滞剂

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